Texas Instruments ADS1258MRTCTEP

Overview

ADS1258MRTCTEP from Texas Instruments is a radiation-tolerant, 16-channel, 24-bit delta-sigma analog-to-digital converter with ±2.5 V bipolar input range, 23.7 kSPS auto-scan data rate per channel, 0.0003% integral nonlinearity, and on-chip temperature/reference/supply monitoring-designed for avionics sensor acquisition systems requiring high channel density and DC stability.

For engineers reviewing the ADS1258MRTCTEP datasheet, ADS1258MRTCTEP pinout, ADS1258MRTCTEP application, or ADS1258MRTCTEP equivalent, this page delivers verified electrical specifications, QFN-48 package layout, GPIO-controlled multiplexer configuration, crystal oscillator integration, and real-world use cases in defense-grade instrumentation where single-cycle settled data and open-sensor detection are critical.

Technical Context

The ADS1258MRTCTEP implements a fourth-order delta-sigma modulator followed by a fifth-order sinc digital filter optimized for low-noise performance at programmable scan rates. Its 16:1 analog multiplexer supports both fixed-channel (125 kSPS) and auto-scan (23.7 kSPS/channel) modes with break-before-make switching and configurable sensor bias current sources (1.5 μA or 24 μA).

Internal system monitoring registers provide real-time readback of die temperature, AVDD/AVSS/DVDD supply voltages, reference voltage, gain, and offset. A 32.768-kHz crystal oscillator (XTAL1/XTAL2) generates a 15.729-MHz system clock, also available as buffered CLKIO output to synchronize external controllers or converters.

Key Specifications

Pinout & Package

ADS1258MRTCTEP is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad connected internally to AVSS. Pin assignments follow TI's standard ADS1258 pinout, supporting SPI interface, GPIO control, analog multiplexer I/O, and integrated crystal oscillator interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution multi-channel ADC applications.

Compared with ADS1258MRTCTEP, ADS1259IPWR offers lower cost but omits military-grade reliability and temperature range, while AD7768-1ACPZ delivers higher single-channel speed at the expense of system integration-making ADS1258MRTCTEP optimal for compact, self-monitoring, multi-sensor platforms in harsh environments.

Availability

ADS1258MRTCTEP is available at Aetrix Electronics and suitable for avionics flight data recorders, medical diagnostic analyzers, industrial process controllers, and defense radar calibration systems requiring stable component supply across extended product lifecycles.

Supply support for ADS1258MRTCTEP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in precision data acquisition and high-reliability IC design.

The ADS1258 product line was engineered for demanding defense, aerospace, and medical applications requiring guaranteed long-term supply, extended temperature operation, and integrated system monitoring-delivering single-chip solutions for fast-scan, high-fidelity sensor interfacing.

FAQ

What is the operating temperature range of the ADS1258MRTCTEP?

The ADS1258MRTCTEP is specified for continuous operation from –55°C to +125°C, meeting military-grade environmental requirements. This extended range is enabled by Texas Instruments' enhanced product (EP) process, including controlled baseline, one assembly/test site, and extended product life cycle management-critical for deployment in avionics and space-constrained defense systems where thermal cycling is severe.

Does the ADS1258MRTCTEP include an integrated oscillator?

Yes, the ADS1258MRTCTEP integrates a 32.768-kHz crystal oscillator with dedicated XTAL1 and XTAL2 pins. When enabled via CLKSEL, it generates a precise 15.729-MHz system clock available on the CLKIO pin. This eliminates the need for an external clock source in most applications and ensures synchronization across multiple ADS1258MRTCTEP devices or companion processors without jitter accumulation.

How many analog input channels does the ADS1258MRTCTEP support?

The ADS1258MRTCTEP supports 16 single-ended or 8 fully differential analog input channels via its integrated 16:1 multiplexer. Channel selection is programmable through SPI commands, and the device operates in either fixed-channel mode (up to 125 kSPS) or auto-scan mode (23.7 kSPS per channel), enabling flexible configuration for diverse sensor architectures without external multiplexer components.

What is the purpose of the MUXOUTP and MUXOUTN pins on the ADS1258MRTCTEP?

The MUXOUTP and MUXOUTN pins provide the differential output of the internal analog multiplexer prior to the ADC core. This allows external signal conditioning-such as filtering, amplification, or isolation-to be applied between the multiplexer and ADC input stage. Using these pins preserves the full 24-bit resolution and low-noise performance while enabling custom front-end adaptation for specific sensor types or EMC requirements.

Can the ADS1258MRTCTEP perform open-sensor detection?

Yes, the ADS1258MRTCTEP includes built-in open-sensor detection using its programmable sensor bias current sources (1.5 μA or 24 μA). By measuring the resulting voltage drop across a connected sensor, the device can identify open circuits-critical for safety-critical applications like flight control or patient monitoring. This function is implemented entirely within the ADS1258MRTCTEP and requires no external comparators or firmware overhead.